profile: indent part of '__enter__'

We are about to introduce a try except. We start with adding the indent to make
the next patch clearer.

mercurial/profiling.py

@@ -188,6 +188,7 b' class profile(object):'
 
         self._output = self._ui.config('profiling', 'output')
 
+        if True:
         if self._output == 'blackbox':
             self._fp = util.stringio()
         elif self._output: